Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1c59704c071388…

MALICIOUS

PDF

85.2 KB Created: 2021-09-23 11:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4b9e934bb45eb7662f9a7e691df05b51 SHA-1: a345df39a3e61d90dbccd54bc638d4656b132f1e SHA-256: 2e1c59704c07138809ad92550644406d1f98b2d342cddf2f16d1f58cf5fe46ac
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs pointing to various websites, including compromised WordPress installations and disposable hosting, which are likely used to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan delivery mechanism. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, potentially for phishing or to download second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=top+email+client+for+android PDF link annotation
    • http://tko.wavedev.net/img/files/files/56845505310.pdfIn PDF document text
    • https://adikketiga.com/contents/files/nagowelilopukakedagunoraj.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/kepoduxutuwunavo.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148d41cb080b---witusexefumeziriguzaj.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161409a8741e71---wowifejoxufolosujawabuzev.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/54239591988.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/64192655139.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/87733525205.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/tazofoxowafowulire.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/bakegef.pdfIn PDF document text
    • https://expomediainc.com/upload/file/rolironifokidowutagox.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/14812384000.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614501c355926---90802874158.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/korutusudijaxepuzokazuwux.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/161307096570d2---juwomivuroposagesina.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/21827159156.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/51386560715.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/gikowaloxawudubivus.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/tufolebiforijezijuzezo.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/88112319027.pdfIn PDF document text
    • https://rezilta.com/psum/admin/userfiles/file/jonoritanorogamuweza.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/puzenonedapuwixomu.pdfPDF link annotation
    • http://s8radziejowice-paszkow.pl/userfiles/file/328287992.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/81375114237.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 10576 bytes
SHA-256: ac5cf3e697495cf81dc370b16966f5a21f73aa311cdf6826e68ad1e90d7922d6
font_01_sfnt_off00010250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 17472 bytes
SHA-256: f4a79f6af65a798480489632d956373da9e3dfd96d651db3583dbf558345d7be
font_02_sfnt_off00012f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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